Title :
Noise analysis of modulated self-oscillating mixers
Author :
De Cos, Elena ; Sancho, Sergio ; Suárez, Almudena
Author_Institution :
Dept. de Ingenieria de Comunicaciones, Cantabria Univ., Santander, Spain
Abstract :
In this work, the envelope transient method is applied for the noise analysis of self-oscillating mixers, with modulated input-signals. Due to the smallness of the noise perturbations, the noisy envelope-transient system can be linearized about the noiseless modulated steady-state solution. This enables a substantial reduction of the computational effort and better insight into the noise behavior of these autonomous systems. The study has been initially carried out in a simplified self-oscillating mixer. Then, it has been applied to a FET-based 5.5 GHz - 0.5 GHz frequency down-converter, with very good agreement with the experimental results.
Keywords :
circuit noise; frequency convertors; linearisation techniques; mixers (circuits); phase noise; transient analysis; 5.5 to 0.5 GHz; computational effort reduction; envelope transient; frequency down-converter; linearization; mixer noise; modulated input-signal; noise behavior; noise perturbation; phase-noise analysis; self-oscillating mixers; steady-state solution; Analytical models; Circuit noise; Diodes; Equations; Frequency conversion; Mixers; Noise reduction; Oscillators; Signal analysis; Steady-state;
Conference_Titel :
Microwave Symposium Digest, 2004 IEEE MTT-S International
Print_ISBN :
0-7803-8331-1
DOI :
10.1109/MWSYM.2004.1338973
